Replace uses of jupyter-clients

This function is used elsewhere.

jupyter-client.el

@@ -311,15 +311,11 @@ method is called."
          (jupyter-alive-p kernel)
          (jupyter-alive-p (jupyter-io kernel)))))
 
-(cl-defmethod jupyter-clients ()
-  "Return a list of all `jupyter-kernel-client' objects."
-  (jupyter-all-objects 'jupyter--clients))
-
 (defun jupyter-find-client-for-session (session-id)
   "Return the kernel client whose session has SESSION-ID."
   (or (cl-find-if
        (lambda (x) (string= (jupyter-session-id (oref x session)) session-id))
-       (jupyter-clients))
+       (jupyter-all-objects 'jupyter--clients))
       (error "No client found for session (%s)" session-id)))
 
 ;;; Client local variables

jupyter-repl.el

@@ -1914,7 +1914,7 @@ If MODE is non-nil, return all REPL buffers whose
 
 If FIRST is non-nil, only return the first REPL buffer that matches."
   (cl-loop
-   for client in (jupyter-clients)
+   for client in (jupyter-all-objects 'jupyter--clients)
    for match =
    (when (and (object-of-class-p client 'jupyter-repl-client)
               (buffer-live-p (oref client buffer)))

jupyter-server.el

@@ -172,7 +172,7 @@ CLIENT must be communicating with a `jupyter-server-kernel', see
   "Return a kernel manager managing kernel with ID on SERVER.
 Return nil if none could be found."
   (cl-loop
-   for client in (jupyter-clients)
+   for client in (jupyter-all-objects 'jupyter--clients)
    thereis (let ((manager (oref client manager)))
              (and (cl-typep manager 'jupyter-server-kernel-manager)
                   (pcase-let (((cl-struct jupyter-server-kernel server id)

test/test-helper.el

@@ -656,7 +656,7 @@ see the documentation on the --NotebookApp.password argument."
    (ignore-errors (delete-directory jupyter-test-temporary-directory))
    (ignore-errors (delete-process (car jupyter-test-notebook)))
    (cl-loop
-    for client in (jupyter-clients)
+    for client in (jupyter-all-objects 'jupyter--clients)
     do (ignore-errors (jupyter-shutdown-kernel client)))
    (cl-loop for server in (jupyter-servers)
             do (ignore-errors (jupyter-ioloop-stop (oref server ioloop))))